Distribution board



FIG. 1 is an isometric view of a distribution board in accordance with the new design;

FIG. 2 is an elevational view thereof;

FIG. 3 is an isometric view of another embodiment of a distribution board in accordance with the new design; and,

FIG. 4 is an elevational view thereof.

The broken lines in the drawings depict portions of the distribution board that form no part of the claimed design. 

CLAIM The ornamental design for a distribution board, as shown and described. 